9. shot (n.) a consecutive series of pictures that constitutes a unit of action in a film
The vacuum level is determined by the pressure differential between the evacuated volume and the surrounding atmosphere. Several units of measure can be used. Most refer to the height of a column of mercury â usually inches of mercury (in.-Hg) or millimeters of mercury (mm-Hg).
There are two methods of vacuum aspiration (also called suction aspiration): 1  Manual vacuum. This procedure can be used around 5 to 12 weeks after the last menstrual period (early first trimester). 2  Machine vacuum. This procedure is a common method used in the first 5 to 12 weeks (first trimester) of pregnancy.